Procmail Problems

More on linux (kernal 2.0 and redhat 3.03) and procmail (local mailer). As
I had said before, When using the MAILDIR command in a rc file, the
directory would not change. 

I noticed something interesting. I have a recipe for dup checking. the
file is called .msgid.cache (I know verry original).

However, when I do a ls -a, I see the file as .msgid.cache?

It seems that there is a '?' appended afterwords.

Is there something that I am missing?

Any hints are apprecitated.

Thanks in advance
Michael